Coordinates & Projection System
Lat / Long Coordinates West East LONGITUDE South North LATITUDE Use negative values west of Greenwich Meridian and south of Equator. West values must be less than East values. South values must be less than North values.
Projection System None - Spherical Globe Cylindrical - Mercator Pseudocylindrical Equal Area- Wagner IV Conic - Equidistant Azimuthal - Equidistant
Scale/Sampling Interval
Scale Height A value of 1 represents real-world height. 10 - 20 are good numbers to try here.
Sampling Interval 30 arc-second 1 minute 5 minutes 10 minutes 20 minutes 30 minutes 1 degrees 2 degrees 5 degrees A value of 5 minutes is full resolution. A value of 5 degrees is extremely low resolution for quick tests of area.
Sea Level
Include Sea Level Yes (include transparent sea level plane) No (just display the terrain data)
Simulated Sea Level meters above actual sea level Negative numbers are also legal values
Output Name/Format
FileName . wrl
Output Data Type VRML V2.0 Will include Wavefront OBJ and ASCII XYZ in the near future.
Request Model
Execute!
Advanced Users
Source Data Type TerrainBase (5 minutes land & water) Will include GTOPO30 in the future.
Center Lat/Long or AutoCentering The center-point for the projection in Lat/Long coordinates. AutoCentering is recommended for most users.
Standard Parallels Designated in degrees Latitude.
Scale Types A value of 1 represents real-world scale. You don't want that. A value of .00001 is about right for most VRML browsers.